Résumé du preprint DAPNIA-05-201

DAPNIA-05-201
Important pickup coupling effect on 8He(p,p) elastic scattering
F. Skaza, N. Keeley, V. Lapoux, N. Alamanos, F. Auger, D. Beaumel, E. Becheva, Y. Blumenfeld, F. Delaunay, A. Drouart, A. Gillibert, L. Giot, K.W. Kemper, R.S. Mackintosh, L. Nalpas, A. Pakou, E.C. Pollacco, R. Raabe, P. Roussel-Chomaz, J.-A. Scarpaci, J.-L. Sida, S. Stepantsov, R. Wolski
The 8He(p,p) and (p, d) reactions were measured in inverse kinematics at 15.7A MeV and analyzed within the coupled
reaction channels framework, the (p, d) cross section being particularly large. We find that coupling to 8He(p, d) pickup has a
profound effect on the 8He(p,p) elastic scattering, and that these strong coupling effects should be included in analyses of proton
elastic and inelastic scattering. Through its modification of the elastic scattering wave functions this coupling will strongly
affect the extraction of spectroscopic information such as the relationship between neutron and proton nuclear deformations,
with important consequences for our understanding of the structure of exotic nuclei.

 

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